I have heard claims that "Dot Tune" was a reliable method to AFMA a lens. I have also heard claims to the contrary. Most of those claims have been long on opinion and short on data, so I decided to give it a try myself on a 7D2.

The observations are: 1) The Reikan values stayed the same between the runs2) The Dot Tune values varied up to 3 units between runs3) Reikan and Dot Tune only agreed once.4) Reikan and Dot Tune can disagree by up to 15 AFMA units

If you look at the discrepancies under the two runs.incandescent - 4, 8,5,1,1,6,1, 8,13,3fluorescent - 6,11,5,2,1,6,2,10,15,0

it appears that Dot Tune is affected by fluorescent lighting.

A quick visual verification of the extreme cases indicates that the Reikan values are far more accurate that the Dot Tune values.

My conclusion. At least on a 7D2, don't waste your time using Dot Tune on your lenses, get Focal and do it right.

I have a 60D with about 100,000 actuations on the shutter. Everything still works, but there appears to be no difference in exposure from 1/500 of a second to 1/8000 of a second. It opens and closes, slower shutter speeds seem OK, but fast seems to be stuck around 1/500.

The camera has never been cleaned or lubed... I was wondering if the problem could be solved with a proper cleaning. From everything I have read, when a shutter fails, it just stops... so I am wondering if clean and lube is the solution.

And NO, I am not going to spray WD40 or something like that into the camera so please don't tell me not to. I am considering sending it back to Canon for a proper cleaning and tune up... I want to keep it as a "magic lantern" camera...

The SX-50 works surprisingly well.... but what changes will come on the SX-60? A larger zoom range is a given... I have heard rumours of 60X and 100X... but does anyone know what the specs are supposed to be?

DPAF would be a killer addition, but I doubt we will see it. Wifi? Megapixels? anything??

Copied this from PetaPixel...Released back in September of 2009, the Canon 7D is long overdue for a much-anticipated refresh. The problem is, up until just recently various sources have published conflicting reports that seem to get us no closer to knowing what this camera will actually look like.

However, yesterday, Northlight Images reported some interesting news that seems to make sense and go along with some of the more plausible rumors about the impending camera.

The Northlight Images report claims that the Canon 7D Mark II will feature a higher end version of the dual pixel sensor Canon used in the 70D. A slightly less powerful version of the tech is also rumored to appear in the 700D (Rebel T5i) and 100D (Rebel SL1) replacements.

However, it seems some manufacturing issues with the dual pixel design of the 70D sensor has delayed production of the 7D Mark II and other successors, forcing Canon to push back release dates until late summer or possibly even early fall.

canon7d_mini

Beyond the new sensor technology in the camera, the below specs are just some of what has been rumored to make an appearance in the 7D successor, although there are a few conflicting reports:•20MP APS-C Sensor•ISO 100-12800 (expandable to 25600)•1/8000 – 30s, Bulb, X=1/250•150,000 shutter life•Silent shutter mode, similar to 5DMIII•19-point phase autofocus•8fps•15 Raw / 126 JPEG Buffer•3.0″ 1040k LCD, touch screen•Optional WiFi•Magnesium Alloy body•Battery capacity 850 shots•148.2 x 110.7 x 73.5 mm•Weight 910g

Ultimately, much of this is up in the air still, with nothing considered confirmed until Canon decides to make an announcement itself, but the rumored specs seem to be fairly logical considering what Canon has put out in the past

Hey fellow Canadians! Grab your snowshoes and put on your parkas and let's go out and show the world what the first day of spring 2014 is like in Canada... When you post, be sure to say what part of the country you took the pictures in.

A friend asked me which one is the best teleconverter and if there is much difference between them. I had to admit that I didn't have a clue... Is there a comparison anywhere of the more popular ones? Canon III, Canon II, Kenco, Sigma, Tamron ??